Is peters co



No. 6'2I,23I. Patented Mar. I4, |899.

J. DUUGLASS.

Lluum cooLEn. (Application lnd Oct. 2, 1597. Ruuwed Feb. 14, 1899.)

(No Modal.)V

Janzen',Y aeylw@ llave/Zar @l M 2122? WlZ/zwJeJ Wwf p ing ice packed onit.

UNITED STATESE PATENT OFFICE; l

JAMEs DoUGLAss, or NEw YORK, N. Y., AssIeNoR To ELLEN rr. DoUG'LAss,

. oF sAME PLAcE.-

LIQUID-oooLER.

SPECIFICATION forming part of Letters Patent No. 621,231, dated March14, 1899.

Application filed October Z, 1897. Renewed February 14,1899. Serial No.705,511.

To @ZZ wir/071e it may concern:

Be it known that I, JAMES DOUGLAss, a citizen ofthe UnitedStates,residing at NewYork, in the county of New York and State of NewYork, have invented a certain new and useful ImprovementJ inLiquid-Coolers, of whichthe following is a specification, referencebeing had to the drawings accompanying and forming a part of the same.

The present invention relates to an irnproved form of liquid-cooler,such as is used for the purpose of cooling beverages of various kinds intheir passage from a source of supply or storage to the point ofdelivery, as in the case of conducting beer, porter, ale, dac., from abarrel or keg and drafting it at a distant point, as, say, at a bar. Asis understood, such coolers usually consist of a long continuous passagemore or less doubled or coiled upon itself, the cooler usually beingplaced upon a rack or in an ice-box and hav- As is well understood inthe art of thus treating such beverages, it is undesirable to have thesame pass over or come in contact with iron, steel, or any similar metallikely to chemically injure or unite with the liquid. Therefore it iscommon to make such apparatus' of copper, tin, or similar metal notoXidizable by the liquid being cooled. Such coolers have been made ofcopper or tin pipe coils; but these are, in such metals and in suchform, costly of construction and do not affordv the best exposure-of thewalls of the passage to the cooling medium and if for economy they aremade of light metal are easily broken or ruptured, as by the ice i havebeen proposed.

v for the maximum cooling eifect,and if made of tin or copper wereunduly costly; and duplicate plates of cast metal or stamped sheetmetal, each having a semicircular passage, I propose to avail of therifle-like form of apparatus, but to form the cap-plate or the platehaving the coolingpassage therein of sheet copper, tin, or other likenon-oxidizable metal bystam ping or simi- (No model.)

larly shaping the same, the form of the passage being practicallya conicarc or inverted- U shape and exterior spaces being formed between thewalls of the passage to practically the depth or breadth of the walls.The conic form of the passage results in a strong are capable ofsustaininga heavy load of ice and permitting the use of alight gage ofmetal with consequent cheapness and ease of forming the same, and at thesame time presents the greatest available area of the walls to thecooling or refrigerating medium, while the area of the walls constitutedby the base-plate and which is not directly submitted-to the coolingmedium is reduced to a minimum.

To this end my improved apparatus consists of a plain flat base-platehaving its upper face of non-oxidizable metal and a superimposed capsheet-metal plate of copper or similar material, which plate isindented, upset, or struck up so that the same constitutes the walls,together with the base-plate,of a continuous passage of an inverted-Uform and having a rifie-like or similar arrangement, the two platesbeing removably secured together by proper holding and packingdevices.Referring to the drawings accompanying this specification, Figure 1 is aplan view, looking on the underneath face of the vcapplate, of one formof my apparatus, this view being shown on a reduced scale. Fig. 2 is anenlarged cross-section on plane a a. Fig. 3 is an enlarged section onthe plane b h.

Referring to the views in detail, A represents the base-plate of theapparatus, which may be of any suitable metal, as already indicated, andof proper form, thickness, and strength. Projecting upwardly from thisplate and at 'various intervals around the edge of the same arescrew-bolts B.

C indicates what I- term the cap-plate. This is composed of sheetmetal-say copper or tinand is brought to form by being stamped in diesor otherwise upset. This stamping or upsetting produces a continuousgroove or passage D of inverted-U shape or conic section form, the sideWalls E ofthe passage slightly inclining away from each other toward thebase of the apparatus, on which they rest in close contact.

F is the flange of the cap-plate, and on this IOO flange rests the frameG, Whichcontinues all around the outer edge of the flange and may besecured thereto by braz'ing or similar process. The edge of the cap andthis frame are pierced at intervals by holes corresponding to theposition of the bolts B of the base-plate, which bolts pass through saidholes'and to above the plate Where they receive thumbnuts H, by Whichthe cap-plate is secured to its base, a packing-strip I being providedto make a liquid-tight joint and to permit the adjustment necessary ofthe cap-plate onits base, so as to bring the edges J of the Wallsbetween adjacent portions of the passage into close contact With thebase-plate. To insure such contact, the edges J extend slightly beloWthe plane of the underneath face of the flange of the cap-plate, or thebase may be correspondingly raised. By thisconstruction and arrangementexterior grooves or spaces K are formed between the adjacent sections ofthe Walls of the passage and so expose the side Walls of the passage tothe action of the cooling medium practically fronrtheir arc tops down tothe edges J, that rest upon the baseplate, thus effecting the maximumextent ofv cooling area. These grooves also act as drains to preventWater collecting between adjacent parts of the passage D.

L L indicate the inlet and outlet couplings, one at each end of thepassage D, which coup lings are designed to connect one With theordinary feed-pipe attached to the source of storage and one With thefaucet device from which the liquid is drafted. What is claimed as newisi l. The herein-described liquid-cooling apparatus, consisting of'abase-plate A, and of a cap-plate of sheet metal constructed With acontinuous groove or passage D therein of inverted- U form, the adjacentWalls E of which passage are separated by a groove K, said passage beingclosed by the said base-plate, substantially as and for the purpose setforth.

2. The herein-described liquid-cooling apparatus, consisting of abase-plate A, and of a cap-plate of sheet metal constructed With acontinuous groove or passage D therein of inverted- U form, the adjacentwalls E of which passage are separated by a groove K, said passage beingclosedby the said base-plate, and means for removably securing saidcapplate to its base, substantially as andjforthe purpose set forth. Y

- JAMES DOUGLASS. Witnesses: Roer. F. GAYLORD,.

JAMES M. CATLoW.

